What is the minimum ISO classification necessary for an anteroom?

• A. 5
• B. 6
• C. 7
• D. 8

Answer: (C)

The minimum ISO classification necessary for an anteroom is ISO 7. Anterooms serve as transitional spaces that help maintain the integrity of the controlled environment where sterile compounding occurs. Specifically, they act as a buffer zone between the cleanroom and the outside environment, helping to reduce the risk of contamination when personnel enter or exit the sterile area.

ISO 7 classification allows for a controlled level of airborne particulate contamination, which is suitable for areas where items may be prepared or sterilized before being brought into a cleaner environment, such as an ISO 5 cleanroom. Such classification allows for a more accommodating environment while still ensuring that contamination risks are minimized through proper airflow and cleanliness standards. In support of this, facilities are often required to maintain strict protocols, such as regular cleaning and monitoring, to ensure that the standards set for ISO 7 are consistently met. This allows the anteroom to effectively support sterile compounding workflows and maintain product integrity.